Gas-engine piston.



' jwomw F. DE PAZI. GAS ENGINE PISTON.

APPLICATION FILED NOV. 10 1911.

1,021,577, Patented Mar. 26, 1912.

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A7: T HE NEY.

' UNITED s ATEs PAT NT OFFIGE.

FULVIO FAZI, OF PR OVIDENCE, RHODE ISLAND, ASSIGNOR OF ONE-HALF TO WILLIAM DOUGLASS BLOSSIIELD, OF PROVIDENCE, RECIPE ISLAND.

GAS-ENGINE PISTON.

Specification of Letters Patent.

Patented Mar. 26, 1912.

' 7 Application filed November 10,. 1911. Serial No. 659,588.

I I To all whom it may concern:

Be it known that I, FULvIo DE Fun a subject of Italy, residing at Providence, in the county of Providence and State of Rhode Island, have invented a new and usetul Improvement in Gas-Engine Pistons, of

which the following is a specification. V

This invention. has reference to animprovement in gas engines and more particularly to an improvement in gas engine pistons.

In' the usual construction of gas engine pistons having a ball and socket joint for the connecting rod, the whole socket is secured to the inside of the piston head, in an inconvenient position for assembling or removal of the. parts, also there is no adequate provision ,for taking up wear in the joint, or for oiling the joint.

The'object of m invention is to improve the construction ot a gas engine piston having a ball and socket joint for the connecting rod, whereby the socket is permanently secured to the piston head, through an opening in the same, the connecting rod having a ball end is inse'rted through the piston head and socket, a thrust block is adjustably secured in the socket and held against.

a retrograde movement, and means are provided for oiling the ball and socket joint.

My invention consists in the peculiar and novel construction of a gas engine piston and ball and socket joint for the connecting rod, said piston and ball joint having detailsof construction, as will be more fully set forth hereinafter and claimed.

Figure 1. is a longitudinal sectional view through a gas engine piston, provided with my improved ball and socket joint for the connecting rod. -Fig.\ 2. is a side view of the thrust block with rightscrew-threads, and Hi 3. is a side view of the set-screw with 16%;- screw-threads.

In the drawings, indicatesa gas engine piston having a transverse radial oil duct 6,

a circular concentric depression? in the' head which maybe of any required depth and a central circular screw-threadedhole 8 in the'head, 9 a connecting rod having, a ball end 10 which with the socket 11.for'ms the ball and socket joint for the connectingrod. The socket 11 has a cylindrical chamber 12 internally screw-threaded at its upper end and shaped at itslower end to fitthe ball end 10 of the connecting rod 9, an outwardly flaring opening 13 from the chamber, for the connecting rod, an internalannular oil groove 14, a transverse radial oil duct 15 on annular shoulder 17, the socket being secured in the screw-threaded hole 8 by screwing the upper end 16, through the hole 8, and by a screw-threaded ring l8 which screws on to the projecting end of the socket against the bottom ofthedepression' 7, thereby rigidly securing the socket to the piston head, as shown in Fig. 1. A cylindrical thrust block 19 having. a semi-spherical cavity 20 in its end, for the ball end of the connecting rod, a radial oil duct 21 and an externally right screw-threaded end 22, ,is

adjustably secured, for'wear, in the socket 11 by screwing the same into the chamber 12. A screw-threaded cap 23 having an an nular flange 24 and a central left screwthreaded hole 25 is secured byscrewing the same into the chamber 12 and a leftscrewthreaded set screw 26 is screwed through the hole 24 in the cap 22 against the thrust block 19 as shown in Fig 1. H

.By this construction all of the removable parts of the ball joint are easily accessible from the outside of the piston head without removing the piston from the engine, the thrustblock is adjustable for Wear from the outside and when adjusted is locked in the adjusted position thereby eliminatinga'atw tling and pounding of the joint, and the oint is adequately oiled.

Having thus described my invention I claim as new and desire to secure by Letters Patent I a 1. An engine piston having a hole in its head, a socket secured to the head of the pistonthrough the hole, a connecting rod having a ball end in the socket, athrust block in the socket engaging with the ball end on the connecting rod, means for adjusting thethrust block for wear, means for holding the thrust block in the adjusted position and meansfor oiling the socket.

2. An engine piston having a screwthreaded hole in its closed end,'a screwthreaded socket in the'screw threaded hole in the piston'end, a connecting rodhaving a ball end in the socket, a thrust block in the socket and fitted to the ball end of they connecting rod, means -for adjusting the 15 socket screwed into the hole in the piston the thrust block for wear, means forholdingthe thrust block in the adjusted position and means for oiling the socket.

4. An engine piston having a screwthreaded hole in its'closed end, a shouldered end, and having a cylindrical chamber con tracted at its inner end, a connecting rod having a ball end in the chamber, athrust block in the chamber and having a semi-spherical cavity in its end for the ball end'of the connecting rod, acap in screwthread engagement with the socket, a set screw in screw-thread engagement with the cap and bearing on the thrust block and means for oiling the socket.

5. An engine piston having a screwthreaded hole in its closed end and a radial oil duct extending into the hole, a shouldered socket having a portion in screw-thread engagement with the hole inthe piston end outer end of the socket, and engaging with the piston end, a connecting rod having a ball end in the socket chamber, a. thrust block in screw-thread engagement with the screw-threaded chamber and havinga semispherical cavity in its end and an oil duct which extends from the cavity outward,

means for adjusting the thrust block for wear, a cap in screw-thread engagement with the outer end of the socket'and having a flange which engages with the ring on the socket and a set screw in screw-thread engagement with the cap and bearing on the thrust block.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

FULVIO DE FAZI.

VVitne'sses C. PERRY WHITE, CHAS. H. LUTHER. 

